Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantos títulos de carreira Roy Emerson tem?
 ###Tabelas: CREATE TABLE televised_era (televised_era_id AUTO_INCREMENT PRIMARY KEY, Year INT, Venue VARCHAR, City VARCHAR, State VARCHAR, Host VARCHAR) CREATE TABLE liquid_measures (liquid_measures_id AUTO_INCREMENT PRIMARY KEY, Unit VARCHAR, Russian VARCHAR, Translation VARCHAR, Ratio VARCHAR, Cubic inches (exact) VARCHAR, Metric value VARCHAR, Imperial VARCHAR, US Customary VARCHAR) CREATE TABLE edmonton_oilers_4_winnipeg_jets_1 (edmonton_oilers_4_winnipeg_jets_1_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, Visitor VARCHAR, Score VARCHAR, Home VARCHAR, Record VARCHAR) CREATE TABLE international_goals (international_goals_id AUTO_INCREMENT PRIMARY KEY, Goal INT, Date VARCHAR, Venue VARCHAR, Result VARCHAR, Competition VARCHAR, Scored INT) CREATE TABLE chronological_list_of_grand_slam_singles_titles_leaders (chronological_list_of_grand_slam_singles_titles_leaders_id AUTO_INCREMENT PRIMARY KEY, Years led VARCHAR, Span of years led INT, Player VARCHAR, Titles won at point of lead INT, Total Career titles INT, Tournament at which lead began VARCHAR)  
SELECT Total Career titles FROM chronological_list_of_grand_slam_singles_titles_leaders WHERE Player = Roy Emerson